diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-04-12 09:30:21 +0400 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-04-12 22:09:39 +0400 |
| commit | 3be4e6990edf65624cfcbf8f7e33810626b2eefa (patch) | |
| tree | e0da9d35af9cd7779ec1c437ebd661892d586689 /arch | |
| parent | a741e67969577163a4cfc78d7fd2753219087ef1 (diff) | |
| download | linux-3be4e6990edf65624cfcbf8f7e33810626b2eefa.tar.xz | |
[POWERPC] Cleanup 32-bit map_page
The 32 bits map_page() function is used internally by the mm code
for early mmu mappings and for ioremap. It should never be called
for an address that already has a valid PTE or hash entry, so we
add a BUG_ON for that and remove the useless flush_HPTE call.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/mm/pgtable_32.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/pgtable_32.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index c284bdac9947..95d3afe36b51 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -266,9 +266,12 @@ int map_page(unsigned long va, phys_addr_t pa, int flags) pg = pte_alloc_kernel(pd, va); if (pg != 0) { err = 0; - set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT, __pgprot(flags))); - if (mem_init_done) - flush_HPTE(0, va, pmd_val(*pd)); + /* The PTE should never be already set nor present in the + * hash table + */ + BUG_ON(pte_val(*pg) & (_PAGE_PRESENT | _PAGE_HASHPTE)); + set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT, + __pgprot(flags))); } return err; } |